Self-assembled TiO<sub>2</sub> hole-blocking layers for efﬁcient perovskite solar cells

Zhongbao Que; Liang Chu; Shuaibo Zhai; Yifei Feng; Chen Chen; Wei Liu; Ruiyuan Hu; Jing Hu; Xing’ao Li

doi:10.1007/s12613-021-2361-8

Volume 29 Issue 6

Jun. 2022

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2022 > 29(6): 1280-1285

Zhongbao Que, Liang Chu, Shuaibo Zhai, Yifei Feng, Chen Chen, Wei Liu, Ruiyuan Hu, Jing Hu, and Xing’ao Li, Self-assembled TiO₂ hole-blocking layers for efﬁcient perovskite solar cells, Int. J. Miner. Metall. Mater., 29(2022), No. 6, pp. 1280-1285. https://doi.org/10.1007/s12613-021-2361-8

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Zhongbao Que, Liang Chu, Shuaibo Zhai, Yifei Feng, Chen Chen, Wei Liu, Ruiyuan Hu, Jing Hu, and Xing’ao Li, Self-assembled TiO2 hole-blocking layers for efﬁcient perovskite solar cells, Int. J. Miner. Metall. Mater., 29(2022), No. 6, pp. 1280-1285. https://doi.org/10.1007/s12613-021-2361-8

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Research Article

Self-assembled TiO₂ hole-blocking layers for efﬁcient perovskite solar cells

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Corresponding author:
Liang Chu E-mail: chuliang@njupt.edu.cn
Received: 1 August 2021; Revised: 29 September 2021; Accepted: 30 September 2021; Available online: 1 October 2021

Abstract

Abstract

The self-assembly process for compatible functional layers of devices is a simple, feasible, and energy-saving strategy. In mesoporous perovskite solar cells (PSCs), compact and scaffold TiO₂ films generally function as the hole-blocking and electron-transporting layers, respectively. However, both of these layers are usually generated through a high-temperature annealing process. Here, we deposited TiO₂ compact films through a room-temperature self-assembly process as effective hole-blocking layers for PSCs. The thickness of TiO₂ compact films can be easily controlled by the deposition time. Through the optimization of TiO₂ compact films (80 nm), the power conversion efficiency (PCE) of mesoporous PSCs without and with hole conductor layers increases up to 10.66% and 17.95%, respectively. Notably, an all-low-temperature planar PSC with the self-assembled TiO₂ layer exhibits a PCE of 16.41%.
- perovskite solar cells;
- titanium dioxide;
- self-assembly;
- power conversion efficiency

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